<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      .two:link {
        color: red;
      }
      .three:hover {
        color: orange;
      }
      .four:active {
        color: yellow;
      }
      .five:visited {
        color: green;
      }
    </style>
  </head>
  <body>
    <!-- 
      :link 表示没访问过的链接（正常链接）
      :visited 表示访问过的链接
      :hover 表示鼠标移入的状态
      :active 表示鼠标点击时的状态
    -->
    <a class="one" href="#">1111111</a><br />
    <a class="two" href="#">2222222</a><br />
    <a class="three" href="#">33333333</a><br />
    <a class="four" href="#">4444444</a><br />
    <a class="five" href="#">5555555</a>
  </body>
</html>
